Composition for the treatment of keratinous material, comprising at least one grafted silicone polymer containing a polysiloxane skeleton grafted with non-silicone organic monomers and at least one anionic polymer

ABSTRACT

The present invention relates to a cosmetic or dermatological composition for the treatment of keratinous material, in particular the hair, comprising, in a cosmetically or dermatologically acceptable medium, at least one grafted silicone polymer, containing a polysiloxane skeleton grafted with non-silicone organic monomers and at least one anionic polymer in an anionic polymer/grafted silicone polymer weight ratio of between 0.25 and 15. 
     The compositions according to the invention are used in particular as rinse-out products or as leave-in products, in particular for the washing, care and conditioning of the hair, for maintaining the hairstyle or for shaping the hairstyle.

This application is a 371 of PCT/FR96/01432 filed Sep. 16, 1996.

The present invention relates to a cosmetic or dermatologicalcomposition for the treatment of keratinous material, in particular thehair, comprising at least one grafted silicone polymer, containing apolysiloxane skeleton grafted with non-silicone organic monomers and atleast one anionic polymer.

Grafted silicone polymers are known in the state of the art, such asthose described in patent applications EP-A-0,582,152 and WO 93/23009.These polymers are proposed in hair compositions for their stylingproperties. However, when these polymers are used, the hold of thehairstyle and the feel of the hair are not satisfactory.

The Applicant has discovered, surprisingly, that by combining at leastone grafted silicone polymer with at least one anionic polymer in ananionic polymer/grafted silicone polymer weight ratio of between 0.25and 15, properties of hair softness and feel are obtained which aresubstantially superior to those obtained with each polymer used alone.

The composition according to the invention is thus essentiallycharacterized in that it comprises, in a cosmetically ordermatologically acceptable medium, at least one grafted siliconepolymer, containing a polysiloxane skeleton grafted with non-siliconeorganic monomers and at least one anionic polymer in an anionicpolymer/grafted silicone polymer weight ratio of between 0.25 and 15.

In the following text, in accordance with that which is generallyaccepted, the term silicone polymer is understood to denote anyorganosilicon polymer or oligomer with a branched or crosslinked, linearor cyclic structure, of variable molecular weight, obtained bypolymerization and/or polycondensation of suitably functionalizedsilanes, and consisting essentially of a repetition of main units inwhich the silicon atoms are linked together by oxygen atoms (siloxanelinkage .tbd.Si--O--Si.tbd.), optionally substituted hydrocarbonradicals being linked directly via a carbon atom to the said siliconatoms. The most common hydrocarbon radicals are alkyl radicals, notablyC_(1-C) ₁₀ alkyl radicals and in particular methyl, fluoroalkylradicals, aryl radicals and in particular phenyl, and alkenyl radicalsand in particular vinyl; other types of radicals which may be linked,either directly or via a hydrocarbon radical, to the siloxane chain are,notably, hydrogen, halogens and in particular chlorine, bromine orfluorine, thiols, alkoxy radicals, polyoxyalkylene (or polyether)radicals and in particular polyoxyethylene and/or polyoxypropylene,hydroxyl or hydroxyalkyl radicals, substituted or unsubstituted aminegroups, amide groups, acyloxy or acyloxyalkyl radicals,hydroxyalkylamino or aminoalkyl radicals, quaternary ammonium groups,amphoteric or betaine groups and anionic groups such as carboxylates,thioglycolates, sulphosuccinates, thiosulphates, phosphates andsulphates, this list not, of course, being limiting in any way(so-called "organomodified" silicones).

According to the present invention, the silicone polymer or polymerswhich must be used are those which comprise a main chain of silicone (orpolysiloxane (.tbd.Si--O--)_(n)) on which is grafted, inside the saidchain as well as optionally on at least one of its ends, at least oneorganic group containing no silicone.

These silicone polymers may be existing commercial products or may beobtained according to any means known to those skilled in the art, inparticular by reaction between (i) a starting silicone correctlyfunctionalized on one or more of these silicon atoms and (ii) anon-silicone organic compound which is itself correctly functionalizedwith a function which is capable of reacting with the functional groupor groups carried by the said silicone, forming a covalent bond; astandard example of such a reaction is the hydrosilylation reactionbetween .tbd.Si--H groups and CH₂ ═CH-- vinyl groups, or alternativelythe reaction between --SH thiofunctional groups and these same vinylgroups.

Examples of silicone polymers which are suitable for carrying out thepresent invention, as well as their particular mode of preparation, aredescribed in particular in patent applications EP-A-0,582,152, WO93/23009 and WO 95/03776, the teachings of which are included in theirentirety in the present description by way of non-limiting references.

According to a particularly preferred embodiment of the presentinvention, the silicone polymer used comprises the result of the radicalcopolymerization between, on the one hand, at least one non-siliconeanionic organic monomer having ethylenic unsaturation and/or anon-silicone hydrophobic organic monomer having ethylenic unsaturation,and, on the other hand, a silicone having in its chain at least onefunctional group capable of reacting with the said ethylenicunsaturations of the said non-silicone monomers, forming a covalentbond, in particular thiofunctional groups.

According to the present invention, the said anionic monomers containingethylenic unsaturation are preferably chosen, alone or as a mixture,from linear or branched, unsaturated carboxylic acids optionallypartially or totally neutralized in the form of a salt, it beingpossible for this or these unsaturated carboxylic acid or acids moreparticularly to be acrylic acid, methacrylic acid, maleic acid, maleicanhydride, itaconic acid, fumaric acid and crotonic acid. The suitablesalts are, in particular, alkali metal, alkaline-earth metal andammonium salts. Similarly, it will be noted that in the final graftedsilicone polymer, the organic group of anionic nature which comprisesthe result of the radical (homo)polymerization of at least one anionicmonomer of unsaturated carboxylic acid type may be, after reaction,post-neutralized with a base (sodium hydroxide, aqueous ammonia etc.) tobring it into the form of a salt.

According to the present invention, the hydrophobic monomers containingethylenic unsaturation are preferably chosen, alone or as a mixture,from alkanol esters of acrylic acid and/or alkanol esters of methacrylicacid. The alkanols are preferably C₁ -C₁₈ and more particularly C₁ -C₁₂.The preferred monomers are chosen from the group consisting of isooctyl(meth)acrylate, isononyl (meth)acrylate, 2-ethylhexyl (meth)acrylate,lauryl (meth)acrylate, isopentyl (meth)acrylate, n-butyl (meth)acrylate,isobutyl (meth)acrylate, methyl (meth)acrylate, tert-butyl(meth)acrylate, tridecyl(meth)acrylate and stearyl (meth)acrylate, ormixtures thereof.

One family of grafted silicone polymers which is particularly suitablefor carrying out the present invention consists of silicone polymerscontaining in their structure the unit of formula (I) below: ##STR1## inwhich the radicals G₁, which may be identical or different, representhydrogen or a C₁ -C₁₀ alkyl radical or alternatively a phenyl radical;the radicals G₂, which may be identical or different, represent a C₁-C₁₀ alkylene group; G₃ represents a polymer residue resulting from the(homo)polymerization of at least one anionic monomer containingethylenic unsaturation; G₄ represents a polymer residue resulting fromthe (homo)polymerization of at least one hydrophobic monomer containingethylenic unsaturation; m and n are equal to 0 or 1; a is an integerranging from 0 to 50; b is an integer which may be between 10 and 350, cis an integer ranging from 0 to 50; with the proviso that one of theparameters a and c is other than 0.

Preferably, the unit of formula (I) above has at least one, and morepreferably all, of the following characteristics:

the radicals G₁ denote an alkyl radical, preferably the methyl radical;

n is non-zero, and the radicals G₂ represent a divalent C₁ -C₃ radical,preferably a propylene radical;

G₃ represents a polymer radical resulting from the (homo)polymerizationof at least one monomer of the carboxylic acid type containing ethylenicunsaturation, preferably acrylic acid and/or methacrylic acid;

G₄ represents a polymer radical resulting from the (homo)polymerizationof at least one monomer of the (C₁ -C₁₀)alkyl (meth)acrylate type,preferably of the isobutyl or methyl (meth)acrylate type.

Examples of silicone polymers corresponding to formula (I) are, inparticular, polydimethylsiloxanes (PDMS) on which are grafted, via athiopropylene-type linking chain, mixed polymer units of thepoly(meth)acrylic acid type and of the polymethyl (meth)acrylate type.

Other examples of silicone polymers corresponding to formula (I) are, inparticular, polydimethylsiloxanes (PDMS) on which are grafted, via athiopropylene-type linking chain, polymer units of the polyisobutyl(meth)acrylate type.

Preferably, the number-average molecular mass of the silicone polymersof the invention ranges approximately from 10,000 to 1,000,000 and evenmore preferably approximately from 10,000 to 100,000.

The grafted silicone polymer is preferably used in an amount rangingfrom 0.01 to 15% by weight relative to the total weight of thecomposition. Even more preferably, this amount ranges from 0.1 to 10% byweight.

According to the invention, any anionic polymer which is known per semay be used. These polymers are preferably fixing polymers, that is tosay polymers having the function of temporarily fixing the hairstyle.

Obviously, one or more anionic polymers may be used.

Thus, the anionic polymers generally used are polymers containing groupsderived from carboxylic, sulphonic or phosphoric acid and have amolecular weight of approximately between 500 and 5,000,000.

The carboxylic groups are provided by unsaturated mono- or dicarboxylicacid monomers such as those corresponding to the formula: ##STR2## inwhich n is an integer from 0 to 10, A denotes a methylene group,optionally connected to the carbon atom of the unsaturated group or tothe neighbouring methylene group when n is greater than 1 via a heteroatom such as oxygen or sulphur, R₁ denotes a hydrogen atom or a phenylor benzyl group, R₂ denotes a hydrogen atom or a lower alkyl or carboxylgroup, and R₃ denotes a hydrogen atom or a lower alkyl group, a --CH₂--COOH group or a phenyl or benzyl group.

In the abovementioned formula, a lower alkyl radical preferably denotesa group having 1 to 4 carbon atoms and in particular methyl and ethyl.

The anionic polymers containing carboxylic groups which are preferredaccording to the invention are:

A) homo- or copolymers of acrylic acid or methacrylic acid or saltsthereof and in particular the products sold under the name Versicol E orK by the company Allied Colloid, and Ultrahold by the company BASF;copolymers of acrylic acid and of acrylamide sold in the form of theirsodium salt under the names Reten 421, 423 or 425 by the companyHercules; sodium salts of polyhydroxycarboxylic acids.

B) copolymers of acrylic or methacrylic acid with a monoethylenicmonomer such as ethylene, styrene, vinyl esters, acrylic or methacrylicacid esters optionally grafted on a polyalkylene glycol such aspolyethylene glycol and optionally crosslinked. Such polymers aredescribed in particular in French patent 1,222,944 and Germanapplication 2,330,956, copolymers of this type containing in their chainan optionally N-alkylated and/or hydroxyalkylated acrylamide unit, asdescribed in particular in Luxembourg patent applications 75370 and75371 or sold under the name Quadramer by the company American Cyanamid.Mention may also be made of copolymers of acrylic acid and of C₁ -C₄alkyl methacrylate and the copolymer of methacrylic acid and of ethylacrylate, sold under the name Luvimer MAEX by the company BASF.

C) copolymers derived from crotonic acid, such as those containing intheir chain vinyl acetate or propionate units and optionally othermonomers such as allylic or methallylic esters, vinyl ether or vinylester of a linear or branched saturated carboxylic acid containing along hydrocarbon chain, such as those containing at least 5 carbonatoms, it being possible for these polymers optionally to be grafted andcrosslinked, or alternatively a vinyl, allylic or methallylic ester ofan α- or β-cyclic carboxylic acid. Such polymers are described, interalia, in French patents 1,222,944, 1,580,545, 2,265,782, 2,265,781,1,564,110 and 2,439,798. Commercial products falling within thiscategory are the resins 28-29-30, 26-13-14 and 28-13-10 sold by thecompany National Starch.

D) polymers derived from maleic, fumaric or itaconic acids or anhydrideswith vinyl esters, vinyl ethers, vinyl halides, phenylvinyl derivatives,and acrylic acid and esters thereof; these polymers may be esterified.Such polymers are described in particular in U.S. Pat. Nos. 2,047,398,2,723,248 and 2,102,113 and GB patent 839,805, and in particular thosesold under the names Gantrez AN or ES by the company ISP.

Polymers also falling within this category are copolymers of maleic,citraconic or itaconic anhydride and of an allylic or methallylic esteroptionally containing an acrylamide or methacrylamide group, anα-olefin, acrylic or methacrylic esters, acrylic or methacrylic acid orvinylpyrrolidone in their chain, the anhydride functions beingmonoesterified or monoamidated. These polymers are described, forexample, in French patents 2,350,384 and 2,35.7,241 by the Applicant.

E) polyacrylamides containing carboxylate groups.

The polymers comprising sulphonic groups are polymers containingvinylsulphonic, styrenesulphonic, napthalenesulphonic oracrylamidoalkylsulphonic units.

These polymers may be chosen in particular from:

salts of polyvinylsulphonic acid having a molecular weight ofapproximately between 1000 and 100,000, as well as copolymers with anunsaturated comonomer such as acrylic or methacrylic acid and estersthereof, as well as acrylamide or derivatives thereof, vinyl ethers andvinylpyrrolidone.

salts of polystyrenesulphonic acid, the sodium salts having a molecularweight of approximately 500,000 and of approximately 100,000, soldrespectively under the names Flexan 500 and Flexan 130 by NationalStarch. These compounds are described in patent FR 2,198,719.

salts of polyacrylamidesulphonic acids, those mentioned in U.S. Pat. No.4,128,631 and more particularly polyacrylamidoethylpropanesulphonic acidsold under the name Cosmedia Polymer HSP 1180 by Henkel.

According to the invention, the anionic polymers are preferably chosenfrom acrylic acid copolymers such as the acrylic acid/ethylacrylate/N-tert-butylacrylamide terpolymer sold under the name UltraholdStrong by the company BASF, copolymers derived from crotonic acid, suchas the vinyl acetate/vinyl tert-butylbenzoate/crotonic acid terpolymersand the crotonic acid/vinyl acetate/vinyl neododecanoate terpolymerssold under the name Resin 28-29-30 by the company National Starch,polymers derived from maleic, fumaric or itaconic acid or anhydride withvinyl esters, vinyl ethers, vinyl halides, phenylvinyl derivatives oracrylic acid and esters thereof, such as the methyl vinylether/monesterified maleic anhydride copolymer sold under the nameGantrez ES 425 by the company ISP, copolymers of methacrylic acid and ofmethyl methacrylate sold under the name Eudragit L by the company RohmPharma, the copolymer of methacrylic acid and of ethyl acrylate soldunder the name Luvimer MAEX by the company BASF and the vinylacetate/crotonic acid copolymer sold under the name Luviset CA 66 by thecompany BASF and the vinyl acetate/crotonic acid/polyethylene glycolterpolymer sold under the name Aristoflex A by the company BASF.

The anionic polymers most particularly preferred are chosen from themethyl vinyl ether/monesterified maleic anhydride copolymer sold underthe name Gantrez ES 425 by the company ISP, the copolymers ofmethacrylic acid and of methyl methacrylate sold under the name EudragitL by the company Rohm Pharma, the copolymer of methacrylic acid and ofethyl acrylate sold under the name Luvimer MAEX by the company BASF, andthe terpolymer of vinylpyrrolidone/acrylic acid/lauryl methacrylate soldunder the name Acrylidone LM by the company ISP.

According to the invention, the anionic polymers may also be used inlatex or pseudolatex form, that is to say in the form of an aqueousdispersion of insoluble polymer particles.

The anionic polymer/grafted silicone polymer weight ratio is preferablybetween 0.3 and 8.

According to the invention, the anionic polymer or polymers mayrepresent from 0.1% to 20% by weight, preferably from 0.2% to 15% byweight and even more preferably from 0.5% to 10% by weight, relative tothe total weight of the final composition.

The cosmetically or dermatologically acceptable medium preferablyconsists of water or of a mixture of water and cosmetically acceptablesolvents such as monoalcohols, polyalcohols, glycol ethers or fatty acidesters, which may be used alone or as a mixture.

Mention may be made more particularly of lower alcohols such as ethanoland isopropanol, polyalcohols such as diethylene glycol, glycol ethers,and alkyl ethers of glycol or of diethylene glycol.

The grafted silicone polymers according to the invention may bedissolved in the said cosmetically acceptable medium or used in the formof an aqueous dispersion of particles.

The composition of the invention may also contain at least one additivechosen from thickeners, fatty acid esters, fatty acid esters ofglycerol, silicones, surfactants, fragrances, preserving agents,sunscreens, proteins, vitamins, polymers, plant, animal, mineral orsynthetic oils and any other additive conventionally used in thecosmetics field.

These additives are present in the composition according to theinvention in proportions which may range from 0 to 20% by weightrelative to the total weight of the composition. The precise amount ofeach additive depends on its nature and is readily determined by aperson skilled in the art.

Obviously, a person skilled in the art will take care to select theoptional compound or compounds to be added to the composition accordingto the invention such that the advantageous properties intrinsicallyassociated with the composition in accordance with the invention arenot, or are substantially not, adversely affected by the additionenvisaged.

The compositions according to the invention may be in the form of a gel,a milk, a cream, a more or less thickened lotion or a foam.

The compositions according to the invention may be used as rinse-outproducts or as leave-in products, in particular for the washing, care,conditioning and maintenance of the hairstyle or the shaping ofkeratinous material such as the hair.

These compositions are more particularly styling products such ashair-setting lotions, blow-drying lotions, fixing compositions(lacquers) and styling compositions. The lotions may be packaged invarious forms, in particular in vaporizers, pump-dispenser bottles or inaerosol cans, in order to ensure application of the composition invaporized form or in the form of a foam. Such packaging forms areindicated, for example, when it is desired to obtain a spray, a lacqueror a foam for fixing or treating the hair.

The compositions may also be shampoos, rinse-out or leave-incompositions to be applied before or after shampooing, dying, bleaching,permanent-waving or straightening of the hair.

When the composition according to the invention is packaged in aerosolform in order to obtain an aerosol foam or lacquer, it comprises atleast one propellant which may be chosen from volatile hydrocarbons suchas n-butane, propane, isobutane, pentane, a chlorinated and/orfluorinated hydrocarbon, and mixtures thereof. Carbon dioxide, nitrousoxide, dimethyl ether, nitrogen, compressed air and mixtures thereof mayalso be used as propellants.

The subject of the invention is also a process for the treatment ofkeratinous material, such as the hair, which consists in applying to thehair a composition as defined above, optionally followed by rinsing withwater.

The invention will now be illustrated more fully with the aid of theexamples which follow, which should not be considered as limiting it tothe embodiments described. (In the following text, AM means activematerial).

EXAMPLE 1 Styling Spray in a Pump-dispenser Bottle

    ______________________________________                                        grafted silicone polymer of formula (I)                                                                 5      g                                            of polymethyl/methylsiloxane structure                                        containing 3-propylthio acid polymethyl                                       methacrylate groups                                                           acrylic acid/ethyl acrylate/N-tert-                                                                     1      g                                            butylacrylamide terpolymer (Ultrahold                                         Strong from BASF)                                                             aminomethylpropanol, 100% neutralization                                      of the two polymers                                                                                qs                                                       ethanol              qs       100    g                                        ______________________________________                                    

EXAMPLE 2 Shampoo

    ______________________________________                                        grafted silicone polymer of formula (I)                                                                1      g                                             of structure polymethyl/methylsiloxane                                        containing 3-propylthio polymethacrylic                                       acid groups and 3-propylthio groups                                           sodium lauryl (C.sub.12 /C.sub.14 70/30) ether                                                         10     g AM                                          sulphate oxyethylenated with 2.2 mol of                                       ethylene oxide, as an aqueous solution                                        containing 28% AM, sold under the name                                        Empicol ESB 3/FL by the company                                               Albright and Wilson                                                           cocoylbetaine as an aqueous solution                                                                   4      g AM                                          containing 28% AM                                                             vinyl acetate/crotonic acid/vinyl                                                                      1      g AM                                          neodecanoate terpolymer sold under the                                        name Resin 28-29-30 by National Starch                                        (neutralized with NaOH)                                                       fragrance, sequestering agent,                                                preserving agent                                                              Water               qs       100    g                                         ______________________________________                                    

The pH is adjusted to 7.5 by addition of sodium hydroxide.

EXAMPLE 3 Styling Spray in a Pump-dispenser Bottle

    ______________________________________                                        grafted silicone polymer of formula (I)                                                                0.5    g                                             of structure polymethyl/methylsiloxane                                        containing 3-propylthio polymethacrylic                                       acid groups and 3-propylthio polymethyl                                       methacrylate groups                                                           methacrylic acid/ethyl acrylate/tert-                                                                  5      g                                             butyl acrylate terpolymer (Luvimer 100                                        P from BASF)                                                                  aminomethylpropanol, 100%                                                     neutralization of the two polymers                                                                qs                                                        water               qs       100    g                                         ______________________________________                                    

EXAMPLE 4 Styling Spray in a Pump-dispenser Bottle

    ______________________________________                                        grafted silicone polymer of formula (I)                                                                2      g                                             of structure polymethyl/methylsiloxane                                        containing 3-propylthio polymethacrylic                                       acid groups and 3-propylthio polymethyl                                       methacrylate groups                                                           methacrylic acid/acrylic acid/ethyl                                                                    7      g AM                                          acrylate/methyl methacrylate copolymer                                        as a 25% aqueous dispersion (Amerhold                                         DR 25 from Amerchol)                                                          Water               qs       100    g                                         ______________________________________                                    

EXAMPLE 5 Aerosol Styling Spray

    ______________________________________                                        grafted silicone polymer of formula (I)                                                                 5      g                                            of structure polymethyl/methylsiloxane                                        containing 3-propylthio polymeth acrylic                                      acid groups and 3-propylthio polymethyl                                       methacrylate groups                                                           vinyl acetate/crotonic acid/vinyl                                                                       2.5    g                                            4-tert-butylbenzoate (65/10/25)                                               copolymer, as described and prepared in                                       patent FR 2,697,160                                                           aminomethylpropanol, 100%                                                     neutralization of the grafted silicone                                        polymer and of the non-silicone copolymer                                                         qs                                                        ethanol             qs        100    g                                        ______________________________________                                    

Pressurization scheme:

    ______________________________________                                        above composition         80    g                                             ternary mixture of n-butane, isobutane                                                                  5     g                                             and propane (23/55/22), sold under the                                        name "Aerogaz 3,2 N" by the company Elf                                       Aquitaine                                                                     1,1-difluoroethane (Solkane 152 A from                                                                  15    g                                             Solvay)                                                                       ______________________________________                                    

EXAMPLE 6 Aerosol Styling Spray

    ______________________________________                                        grafted silicone polymer of formula (I)                                                                 4.6    g                                            of structure polymethyl/methylsiloxane                                        containing 3-propylthio polymethacrylic                                       acid groups and 3-propylthio polymethyl                                       methacrylate groups                                                           vinyl acetate/crotonic acid/vinyl                                                                       3      g                                            4-tert-butylbenzoate (65/10/25)                                               copolymer, as described and prepared in                                       patent FR 2,697,160                                                           aminomethylpropanol, 100% neutralization                                      of the grafted silicone polymer and of                                        the non-silicone copolymer                                                                        qs                                                        ethanol                       38.5   g                                        water               qs        100    g                                        ______________________________________                                    

Pressurization schema:

    ______________________________________                                        above composition:                                                                             65 g                                                         dimethyl ether   35 g                                                         ______________________________________                                    

EXAMPLE 7

Two compositions A and B according to the invention were prepared andwere compared with compositions C and D each containing only one of thetwo polymers, and compared with composition E which contains the twopolymers but in a ratio not included in the invention. The fivecompositions were packaged in a pump-dispenser bottle. A panel of fiveexperienced testers evaluated the softness of the hair after treatmentwith these compositions.

The grading ranged from 0 (poor) to 5 (excellent), that is to sayranging from not soft at all to extremely soft.

The results are collated in the following table:

    ______________________________________                                                  A       B       C      D      E                                               (Inven- (Inven- (Compar-                                                                             (Compar-                                                                             (Compar                               In g AM   tion)   tion)   ative) ative)                                       ative)                                                                        ______________________________________                                        PSV.sup.(1)                                                                             0.5     1       1.5    --     1.3                                   Gantrez ES                                                                              1       0.5     --     1.5    0.2                                   425.sup.(2)                                                                   AMP.sup.(3)                                                                             qs      qs      qs     qs     qs                                    100%                                                                          neutralization                                                                of the polymer                                                                or polymers                                                                   Water qs  100     100     100    100    100                                   R         2       0.5     --     --     0.15                                  Softness  4       4.25    3.5    3.5    3.25                                  ______________________________________                                         R = Gantrez ES 425/PSV                                                        .sup.(1) PSV: grafted silicone polymer of formula (I) of structure            polymethyl/methylsiloxane containing 3propyl-thio polymethacrylic acid        groups and 3propylthio polymethyl methacrylate groups.                        .sup.(2) Gantrez ES 425: methyl vinyl ether/monoesterified maleic             anhydride copolymer sold by the company ISP                                   .sup.(3) AMP: 2Amino-2-methylpropanol                                    

Hair treated with compositions A and B according to the invention issofter than hair treated with compositions containing only one of thetwo polymers. When the two polymers are present in a ratio which is notbetween 0.25 and 15 (composition E), there is no improvement in thesoftness of the hair when compared with the polymers used alone(compositions C and D).

What is claimed is:
 1. A cosmetic or dermatological composition fortreating keratinous material, said composition comprising, in acosmetically or dermatologically acceptable medium, at least one graftedsilicone polymer, said at least one grafted silicone polymer containinga polysiloxane skeleton grafted with at least one non-silicone organicmonomer, and at least one anionic polymer, said polymers being presentin an anionic polymer/grafted silicone polymer weight ratio ranging from0.25 to 15,wherein said at least one anionic polymer is an acrylicacid/ethyl acrylate/N-tert-butylacrylamido terpolymer, a vinylacetate/vinyl tert-butylbenzoate/crotonic acid terpolymer or a crotonicacid/vinyl acetate/vinyl neododecanoate terpolymer.
 2. A compositionaccording to claim 1, wherein said at least one grafted silicone polymercomprises a main chain of polysiloxane on which is grafted, inside saidmain chain, as well as optionally on at least one of its ends, at leastone organic group containing no silicone.
 3. A composition according toclaim 1, wherein said at least one grafted silicone polymer can beobtained by radical copolymerization of at least one non-siliconeanionic organic monomer containing:a) ethylenic unsaturation, and/or b)a non-silicone hydrophobic organic monomer having ethylenicunsaturation, and c) a polysiloxane having in its main chain at leastone functional group that will react with said ethylenic unsaturation ofsaid non-silicone monomers.
 4. A composition according to claim 3,wherein said at least one non-silicone anionic organic monomercontaining ethylenic unsaturation is selected from linear and branchedunsaturated carboxylic, acid or mixture of monomers thereof.
 5. Acomposition according to claim 4, wherein said at least one non-siliconeanionic organic monomer containing ethylenic unsaturation is selectedfrom at least one acrylic acid, methacrylic acid, maleic acid, maleicanhydride, itaconic acid, fumaric acid, crotonic acid, alkali metal saltof any of the above, alkaline-earth metal salt of any of the above, andammonium salt of any of the above.
 6. A composition according to claim3, wherein said non-silicone hydrophobic organic monomer containingethylenic unsaturation is selected from at least one acrylic acid esterof an alkanol and methacrylic acid ester of an alkanol.
 7. A compositionaccording to claim 6, wherein said alkanol having from 1 to 18 carbonatoms.
 8. A composition according to claim 6, wherein said non-siliconehydrophobic organic monomer containing ethylenic unsaturation isselected, alone or as a mixture of monomers, from isooctyl(meth)acrylate, isononyl (meth)acrylate, 2-ethylhexyl (meth)acrylate,lauryl (meth)acrylate, isopentyl (meth)acrylate, n-butyl (meth)acrylate,isobutyl (meth)acrylate methyl (meth)acrylate, tert-butyl(meth)acrylate, tridecyl (meth)acrylate and stearyl (meth)acrylate.
 9. Acomposition according to claim 1, wherein said at least one graftedsilicone polymer comprises, on the main silicone chain thereof, at leastone organic group of anionic nature, said organic group being capable ofbeing obtained by radical (homo)polymerization of at least one anionicmonomer of an unsaturated carboxylic acid, wherein said at least oneanionic monomer of an unsaturated carboxylic acid is partially ortotally neutralized in the form of a salt.
 10. A composition accordingto claim 1, wherein said at least one grafted silicone polymer is asilicone polymer containing in its structure the unit of formula (I):##STR3## in which the radicals G₁, which may each be identical ordifferent, represent hydrogen, a C₁ -C₁₀ alkyl radical, or a phenylradical; the radicals G₂, which may each be identical or different,represent a C₁ -C₁₀ alkylene group; G₃ represents a polymer residueresulting from the (homo)polymerization of at least one anionic monomercontaining ethylenic unsaturation; G₄ represents a polymer residueresulting from the (homo)polymerization of at least one hydrophobicmonomer containing ethylenic unsaturation; m and n are independentlyequal to 0 or 1; a is an integer ranging from 0 to 50; b is an integerranging from 10 to 350; and c is an integer ranging from 0 to 50; withthe proviso that one of a or c is other than
 0. 11. A compositionaccording to claim 10, wherein said unit of formula (I) has at least oneof the following characteristics:the radicals G₁ denote a C₁ -C₁₀ alkylradical; n is equal to 1, and each of the radicals G₂ represents adivalent C₁ -C₃ radical; G₃ represents a polymer radical resulting fromthe (homo)polymerization of at least one monomer of a carboxylic acidcontaining ethylenic unsaturation; or G₄ represents a polymeric radicalresulting from the (homo)polymerization of at least one monomer of a C₁-C₁₀ alkyl (meth)acrylate.
 12. A composition according to claim 10,wherein said unit of formula (I) simultaneously has each of thefollowing characteristics:each of the radicals G₁ denotes a methylradical; n is equal to 1 and the radicals G₂ represent a propyleneradical; G₃ represents a polymer radical resulting from the(homo)polymerization of at least acrylic acid and/or methacrylic acid;and G₄ represents a polymer radical resulting from the(homo)polymerization of at least one monomer of an isobutyl or methyl(meth)acrylate.
 13. A composition according to claim 1, wherein thenumber-average molecular mass of said at least one grafted siliconepolymer ranges approximately from 10,000 to 1,000,000.
 14. A compositionaccording to claim 13, wherein said number-average molecular mass ofsaid at least one grafted silicone polymer ranges approximately from10,000 to 100,000.
 15. A composition according to claim 1, wherein saidat least one grafted silicone polymer is present in an amount rangingfrom 0.01 to 15% by weight relative to the total weight of thecomposition.
 16. A composition according to claim 15, wherein said atleast one grafted silicone polymer is present in an amount ranging from0.1 to 10% by weight relative to the total weight of the composition.17. A composition according to claim 1, wherein said anionicpolymer/grafted silicone polymer weight ratio ranges from 0.3 to
 8. 18.A composition according to claim 1, wherein said at least one anionicpolymer is present in an amount ranging from 0.1 to 20% by weightrelative to the total weight of the composition.
 19. A compositionaccording to claim 18, wherein said at least one anionic polymer ispresent in an amount ranging from 0.2 to 15% by weight relative to thetotal weight of the composition.
 20. A composition according to claim19, wherein said at least one anionic polymer is present in an amountranging from 0.5 to 10% by weight relative to the total weight of thecomposition.
 21. A composition according to claim 1, said compositionfurther comprising at least one additive selected from the groupconsisting of thickeners, fatty acid esters, fatty acid esters ofglycerol, silicones, surfactants, fragrances, preserving agents,sunscreens, proteins, vitamins, polymers, plant, animal, mineral andsynthetic oils.
 22. A composition according to claim 1, wherein saidcosmetically or dermatologically acceptable medium comprises water or amixture of water and at least one cosmetically acceptable solvent.
 23. Acomposition according to claim 22, wherein said at least onecosmetically acceptable solvent is a monoalcohol, a polyalcohol, aglycol ether, a fatty acid ester, or a mixture thereof.
 24. Acomposition according to claim 1, wherein said at least one graftedsilicone polymer is dissolved in said cosmetically or dermatologicallyacceptable medium or used in the form of an aqueous dispersion ofparticles.
 25. A composition according to claim 1, wherein saidkeratinous material is human hair.
 26. A composition according to claim1, which is in the form of a gel, a milk, a cream, a thickened lotion ora foam.
 27. A composition according to claim 1, wherein said compositionis a hairstyling product.
 28. A composition according to claim 1,wherein said composition is a shampoo hair product, or a rinse-out orleave-in hair product to be applied before or after shampooing, dyeing,bleaching, permanent-waving, or straightening of the hair.
 29. Acomposition according to claim 1, wherein said composition is packagedin a vaporizer, a pump-dispenser bottle or an aerosol can to obtain aspray, a lacquer or a foam.
 30. A non-therapeutic process for treatingkeratinous material, said process comprising applying to said keratinousmaterial a composition according to claim 1, optionally followed byrinsing with water.
 31. A process according to claim 30, wherein saidkeratinous material is human hair.